Extract an iterations x chains matrix of draws of a single variable. This is primarily used for convergence diagnostic functions such as rhat().

extract_variable_matrix(x, variable, ...)

# S3 method for default
extract_variable_matrix(x, variable, ...)

# S3 method for draws
extract_variable_matrix(x, variable, ...)

# S3 method for draws_rvars
extract_variable_matrix(x, variable, ...)

Arguments

x

(draws) A draws object or another R object for which the method is defined.

variable

(string) The name of the variable to extract.

...

Arguments passed to individual methods (if applicable).

Value

A matrix with dimension iterations x chains.

Examples

x <- example_draws() mu <- extract_variable_matrix(x, variable = "mu") dim(mu)
#> [1] 100 4
rhat(mu)
#> [1] 1.021923